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Chapters 26 & 27: Reproductive Systems & Human Development and Heredity Flashcards | StudBud
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Chapters 26 & 27: Reproductive Systems & Human Development and Heredity
Chapters 26 & 27: Reproductive Systems & Human Development and Heredity
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The Human Body in Health and Illness, 7th Edition
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1
Example is sickle cell anemia.
multiple allele inheritance
polygene inheritance
incomplete dominance
sex-linked inheritance
2
Gives rise to recombinant chromosomes that have mixed contributions from each parent.
independent assortment of chromosomes
random fertilization of eggs by sperm
crossover of homologues
3
Two alleles controlling a trait are different.
homologous chromosomes
homozygous
alleles
heterozygous
4
Which of the following forms structures of the nervous system?
endoderm
mesoderm
ectoderm
5
Base for umbilical cord to link embryo to placenta & eventually becomes part of urinary bladder
chorion
allantois
yolk sac
amnion
6
Variability is further compounded by the fact that fertilization occurs on a random basis.
crossover of homologoes
independent assortment of chromosomes
random fertilization of eggs by sperm
7
One DNA replication event + one division event.
meiosis
mitosis
8
An allele that masks or suppresses the expression of its partner.
genotype
dominant
recessive
phenotype
9
The expressed traits a person exhibits.
dominant
recessive
genotype
phenotype
10
Which step in embryonic development is characterized by formation of three primary germ layers?
organogenesis
capacitation
spermatogenesis
gastrulation
11
Produces haploid cells.
meiosis
mitosis
12
Example is ABO blood type.
incomplete dominance
sex-linked inheritance
polygene inheritance
multiple allele inheritance
13
Produces four equally divided daughter cells.
oogenesis
spermatogenesis
14
Two alleles controlling a trait are the same.
heterozygous
alleles
homozygous
homologous chromosomes
15
Temporary organ is formed that originates from both embryonic tissue and maternal tissue.
implantation
cleavage
placentation
16
Outermost membrane which encloses the embryonic body and all other membranes.
amnion
allantois
yolk sac
chorion
17
After 3-4 days the embryo consists of about 100 cells and has reached the uterus.
placentation
cleavage
implantation
18
Matched genes at the same locus on homologous chromosomes.
homozygous
homologous chromosomes
heterozygous
alleles
19
Produces four daughter cells.
meiosis
mitosis
20
Which of the following forms the intervertebral discs?
notochord
somites
intermediate mesoderm
21
Most common place for fertilization to occur.
uterus
ovary
perimetrium
uterine tube
22
A person's actual genetic makeup.
dominant
phenotype
recessive
genotype
23
One DNA replication event + two division event.
meiosis
mitosis
24
Produces testosterone.
testes
bulbourethral gland
epididymis
interstitial cells
25
Pair of chromosomes.
homologous chromosomes
heterozygous
homozygous
alleles
26
Layer of uterus which contains smooth muscle cells.
myometrium
uterus
perimetrium
uterine tube
27
Month fetal dev- blood cell formation in marrow, ossification is accelerating & gender detected
4 months
5 months
3 months
6-7 months
28
Sperm gain the ability to swim here.
ejaculatory gland
interstitial cells
testes
epididymis
29
Maternal and fetal blood supplies are very close but are separated by the chorionic membrane.
placentation
implantation
cleavage
30
Which of the following structures contains the mitrochondria?
midpiece
flagellum
head
tail
31
A phenotype depends on several gene pairs at different locations acting in tandem.
incomplete dominance
sex-linked inheritance
polygene inheritance
multiple allele inheritance
32
Mth fetal dev-myelination spinal cord begin, eyes open, bone marrow sole site blood cell form
6-7 months
3 months
5 months
4 months
33
An allele that can be masked or suppressed by another allele.
genotype
dominant
recessive
phenotype
34
Which of the following structures release enzymes to enable a sperm to fertilize the oocyte?
midpiece
tail
acrosome
flagellum
35
The period from fertilization through week eight is called what?
pronuclear period
embryonic period
third trimester
fetal period
36
Produces diploid cells.
mitosis
meiosis
37
Produces four daughter cells with unequal cytoplasmic division.
spermatogenesis
oogenesis
38
Place where sperm and seminal fluid mix.
ejaculatory gland
epididymis
bulbourethral gland
Interstital cells
39
Allele codes for gene Tt, express different allele possibilities as T & t. Homozygous recessive
tt
TT
Tt
40
Trophoblast attaches to the uterus and erodes some of the endometrium.
cleavage
placentation
implantation
41
Produces two daughter cells.
mitosis
meiosis
42
Period of rapid mitotic divisions of the zygote without much growth of the cells.
placentation
cleavage
implantation
43
The menstrual cycle is blocked as trophoblast cells secrete human chorionic gonadotrophin (hCG)
implantation
cleavage
placentation
44
Primary sex organ in the female.
myometrium
uterine tube
ovary
uterus
